Sole of a cross country ski boot



FIG. 1 is a bottom plan view of the cross-country ski boot sole according to applicant's design;

FIG. 2 is a view taken from the left of FIG. 3;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side view taken from the right of FIG. 3;

FIG. 5 is a front elevation thereof; and,

FIG. 6 is rear elevation thereof. 

I claim the ornamental design for a sole of a cross-country ski boot, as shown and described. 